DuraVent DuraChimney II - Manual (Page 13)

13
Figure 17
installed 1” off the Chase Top Flashing to provide
proper ventilation (Fig. 15). Tighten the bolts
of the Storm Collar and seal the Storm Collar
against the Chimney with sealant. Be sure
Chimney and Offsets are properly supported.
Attach the Chimney Cap onto the top of the
chimney by setting the female end of the Cap
onto the male end of the last Chimney Section.
Secure the Cap by using (4) sheet metal screws
provided (Fig. 16). Do not push down from the
top portion of the cap as this may damage the
cap. Push from the lower section of the Cap if
needed. The Chimney Cap can be removed for
chimney cleaning as described in the Chimney
Maintenance section of the instructions.
14. Enclosures: Enclose chimneys where
they pass through occupied spaces, including
closets. Always maintain at least a 2-inch
clearance between the chimney and any
combustible materials. Interior enclosures
may be constructed with standard framing and
sheathed with sheetrock or plywood. Use a Wall
Strap or Stabilizer at least every 8 feet to maintain
a minimum of 2 inches of air space between the
chimney and combustible materials.
OFFSET ELBOW INSTALLATION
A 30° Elbow (measured from the vertical) is
the largest that can be used in an offset. A
30° Elbow may not be combined with another
elbow to make a steeper offset (e.g. two 30°
Elbows are not allowed to be put together to
form a 60° elbow). Avoid Elbows if possible. A
totally vertical chimney is more efficient. When
Elbows are necessary to avoid obstructions
such as rafters, ridgepoles, or joists, you
are only allowed to use 1 pair of Elbows in
any one chimney system. Refer to Offset
Chart in Table 3 (page 14) to determine the
pipe sections needed for the offset desired.
Horizontal runs of chimney violate building
code and are not allowed. Figure 18
1. Attach Elbows: Attach Elbow to Chimney
Section or other Elbow by mating the male
and female ends with each other and
using the (4) sheet metal screws provided.
Attach one Elbow to the Chimney Section
below, and align it for the offset. Determine
the required offset length and attach an
30° OR 15°
ELBOW STRAP
ELBOW
ELBOW STRAP
1 PER
SECTION
ELBOW STRAP